Hi, Rafael 在 2013-06-06四的 13:00 +0200，Rafael J. Wysocki写道： > On Thursday, June 06, 2013 09:40:32 AM liguang wrote: > > This patch-set try to support physically hot-plug/unplug > > a cpu automatically, that is: > > if you offline a cpu, it will automatically actually remove > > a cpu, and if you hot-plug a cpu, then it will online this > > cpu automatically. > > No and no. Hmm... are you saying cpu online/offline designed to distinguish with real cpu plug/unplug? but, what the actual usage of online/offline? forgive my foolish. > > Why do you need this? > e.g. for QEMU case, if hot-plug a cpu, we have to online a cpu manually if there's no user space support like udev to do it automatically. and also, I think maybe online/offline should be naturally integrated with real plug/unplug process of CPU. > > > > so, offline is just like eject, but eject attribute seems not > > available since recent kernel(can't figure out when), with > > this driver, if allowed, it will trigger a eject cpu process. > > and for automatically online, it was said there are objections, > > don't know the reason, so, send this patch-set boldly. > > > > of course, this approach is for QEMU 's hotplug cpu emulation > > only, but not limited, if someone like to explore ec space to > > implment cpu hot-plug/unplug for real platform please > > feel free to continue. > > > > Li Guang (3) > > drivers/platform/x86: add cpu physically hotplug driver > > ec: add ec space notifier > > cpu_physic_hotplug: register handler for ec space notifier > > > > drivers/acpi/ec.c | 32 ++++++++++++++++++++++++++++++++ > > drivers/platform/x86/Kconfig | 8 ++++ > > drivers/platform/x86/Makefile | 1 + > > drivers/platform/x86/cpu_physic_hotplug.c | 90 +++++++++++++++++++++++++++++ > > include/linux/acpi.h | 2 ++ > > 5 files changed, 130 insertions(+), 3 deletions(-) > > create mode 100644 drivers/platform/x86/cpu_physic_hotplug.c -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
